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The Reproductive Susceptibility of Tomato Fruit Worm Heliothis Armigera (Hubner). (Lepidoptera: Phalaenidae) at a Different Temperatures and Hosts Plants

Abstract

Meeri Kadhim Mubasher Al-Fatlawi, Alaa Hussin Abed, Mohammed sahib abed, Ahmed A. AL nuaimy

The Reproductive Susceptibility of Tomato Fruitworm Heliothis armigera (Hubner). (Lepidoptera: phalaenidae) at a different Temperatures and Hosts plants. Reproductive viability tables have been studied for H. armigera were studied in three plant families and four different temperatures in the laboratory. The experiment included calculating the average life span of a female, the average age of the female at the first reproduction, the average number of eggs per female, the net compensation rate, the average duration of the generation and the average internal increase of the insect population on tomato, cotton and yellow corn at temperatures 20, 25, 30 and 35 ° C. The results showed that the adult survival rate was 83% when the insect was raised on tomato at 30 ºm, while the lowest percentage reached 55% at 35 cº on the yellow corn plant. The highest rate of insect life was 20 days at 35 ° C on yellow corn, while it decreased to the lowest rate of 10 days at 30 ° C on tomato. The results of the laboratory study showed that the highest average age of a female insect at the first reproduction was 9 days at 35 ° C on the yellow corn, while it decreased to its lowest rate at a temperature of 30 ° C on the studied plant families, when it reached 3 days, and the female placed her highest rate of eggs At a temperature of 30 ° C on tomato, it decreased to the lowest rate of 40.30 eggs at a temperature of 35 ° C on yellow corn, and it was found that the lowest net compensation rate (RO) for insect females was 7.97 female / female / generation at a temperature of 35% on yellow corn, while higher The average of 146.75 female / female / generation at a temperature of 30 ° C on tomato. The results of the study showed that the lowest rate for insect generation is 32.59 days at 30 ºm on tomato crop and offset by the highest rate of generation 65.65 days at 20 ºm on yellow corn, and also showed that the highest internal increase rate (rm) of the insect population was 0.066 at 30 ?m on tomato in When the lowest was 0.014 at 20 ºm on the yellow corn, therefore, when planting the three studied plant families, the tomato plant has a significant effect on the life aspects of the insect and consequently its numbers increase, followed by the cotton and yellow corn crop, respectively. It was found that the best temperature for insect growth and development is 30 ° C compared to the tested temperatures. These results were among the prerequisites needed to understand the life and behavioral aspects of Tomato Fruit worm H. armigera and an integrated program for its management.

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